Flexible security control environment

ABSTRACT

An automation control system is provided with an interface device configured to enable a user to monitor, control, or monitor and control processes of the automation control system. Upon power on or initialization of the interface device or when a previously logged in user is logged off, the interface device logs in a guest account associated with a user role having a defined set of access rights and provides access to monitor, control, or monitor and control the processes based upon the set of access rights.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a Non-Provisional Application of U.S. ProvisionalPatent Application No. 61/558,985, entitled “Visualization SoftwarePlatform and Terminal”, filed Nov. 11, 2011, which is hereinincorporated by reference in its entirety for all purposes.

BACKGROUND

Embodiments of the present disclosure relate generally to the field ofautomation control and monitoring systems. More particularly,embodiments of the present disclosure relate to flexible securityimplementations in the automation control and monitoring systems.

A wide range of applications exist for automation control and monitoringsystems, particularly in industrial settings. Such applications mayinclude the powering of a wide range of actuators, such as valves,electric motors, and so forth, and the collection of data via sensors.Typical automation control and monitoring systems may include one ormore components, such as: programming terminals, automation controllers,input/output (I/O) modules, and/or human-machine interface (HMI)terminals.

The human machine interfaces or “HMIs” are commonly employed formonitoring or controlling various processes. The HMIs may read from orwrite to specific registers such that they can reflect the operatingstate of various machines, sensors, processes, and so forth. Theinterfaces can also write to registers and memories such that they can,to some extent, control the functions of the process. In monitoringfunctions alone, little or no actual control is executed. In many othersettings, similar devices are employed, such as in automobiles,aircraft, commercial settings, and a host of other applications. In manyapplications, the interface may not communicate with a remote device orprocess, but may be operated in a stand-alone manner.

In these interface devices, the objects used in the interface maycorrelate to different controls, monitors, or any other parameter of anindustrial automation device. Some of these objects may have visualrepresentations on the interface devices, while other objects may not bevisually represented but may be accessible for configuration andprogramming by a user. A user may desire to manipulate these objects,such as by creating new objects, copying objects, editing objects, etc.,to create and customize an interface.

Each of the components in an automation control and monitoring systemmay make use of state information of one or more objects (e.g., controlprograms, tags, module configuration, and HMI screens) of the controland monitoring system. As may be appreciated, each industry and/orcontrol environment may make use of customized processes and/or controlenvironment implementations. For example, customers who implement theautomation control and monitoring systems may vary drastically regardingsecurity policies, etc. around access rights to one or more objects viathe interface devices. Unfortunately, these customers are oftentimeslimited by, or must work around, standard security implementationsprovided by the manufacturers of the interface devices.

BRIEF DESCRIPTION

Certain embodiments commensurate in scope with the originally claimedinvention are summarized below. These embodiments are not intended tolimit the scope of the claimed invention, but rather these embodimentsare intended only to provide a brief summary of possible forms of theinvention. Indeed, the invention may encompass a variety of forms thatmay be similar to or different from the embodiments set forth below.

In traditional automation control and monitoring systems, a user may berequired to present user authentication upon power up and/orinitialization of an interface device or when a previous user logs outof the interface device. Accordingly, even the most basic functions haverequired a user to input at least a PIN to access the interface device.

Present embodiments provide a novel approach to enable flexible securityfor interface devices of an automation control and monitoring system. Arole-based security solution is provided that includes a guest useraccount. The guest user account may be automatically logged into theinterface device as it is powered on or initializes or as a user logsout of the interface device. Accordingly, without any interaction from auser of the interface device, a guest user account may be logged in uponpower up or initialization of the interface device or upon a userlogging out of the interface device. A role may be associated with theguest user account to customize access rights for this user account. Therole associated with the guest user account and the access rightsassociated with the role may determine the access allowed by the guestuser. If additional access (e.g., to objects within the automationcontrol and monitoring system) is needed, the user may login as a userwith a different role (e.g., administrator, engineer, maintenance crew,operator, supervisor, etc.), which will enable access for the particularrole or roles associated with the user. Further, a restricted accessrole may be associated with the guest user account. The restrictedaccess role may be used to provide limited access rights to particularroles. For example, because the guest user account may be logged inwithout any authentication input (e.g., a password or personalidentification number (PIN)), the restricted access role may be usefulto provide limited access to the interface device. Accordingly, with theguest user account that is automatically logged in when the interfacedevice is powered on, initialized, or when an alternate user logs outand a restricted user role that may provide customized user accessrights for accounts that do not have an associated authentication input(e.g., password, PIN, RFID access code, biometric input, barcode, etc.),an administrator of the interface device may configure the interfacedevice to provide access or restrict access of components of theinterface device when the guest user account is logged in (e.g., whenuser accounts with associated authentication inputs are not logged in).While the current discussion focuses on an administrator role, anengineer role, a maintenance role, and operator role, a supervisor role,and a restricted role, other roles may be specified by the manufacturerof the interface device and/or users of interface device.

DRAWINGS

These and other features, aspects, and advantages of the presentembodiments will become better understood when the following detaileddescription is read with reference to the accompanying drawings in whichlike characters represent like parts throughout the drawings, wherein:

FIG. 1 is a general overview of a framework for portions of anautomation control and monitoring system in accordance with anembodiment of the present invention;

FIG. 2 is a diagrammatical overview of an automation control andmonitoring system in accordance with an embodiment of the presentinvention;

FIG. 3 is an overview of certain of the functional components in aninterface and a programming terminal in accordance with an embodiment ofthe present invention;

FIG. 4 is an overview of certain views or containers of device elementsin accordance with an embodiment of the present invention;

FIG. 5 is a schematic view of a security programming screen of thecontrol and monitoring system of FIG. 2, in accordance with anembodiment of the present invention;

FIG. 6 is a schematic diagram of security properties of components ofthe control and monitoring system, illustrating security inheritanceamong folders and screens, in accordance with an embodiment of thepresent invention;

FIG. 7 is a schematic diagram of security properties of a screen of thecontrol and monitoring system, illustrating security inheritance from ascreen to objects on the screen, in accordance with an embodiment of thepresent invention;

FIG. 8 is a flowchart, depicting a process for implementing flexiblesecurity settings in an automation control and monitoring system, inaccordance with an embodiment of the present invention;

FIG. 9 is a schematic view of a human-machine interface (HMI) with theflexible security features described herein, in accordance with anembodiment of the present invention; and

FIG. 10 illustrates a visualization of a toolbar incorporating flexiblesecurity elements, in accordance with an embodiment of the presentinvention.

DETAILED DESCRIPTION

Traditionally, security for control and monitoring systems has not beenvery flexible. For example, customers of interface devices, such ashuman-machine interfaces (HMIs), have traditionally had limited optionsregarding how users may make use of the interface devices. Because awide variety of industry and/or control environment security policiesexist, these inflexible security implementations do not provide optionsfor every HMI customer. In accordance with present embodiments, throughuse of a guest account in the HMI, the security configurations of HMIdevices may be highly customizable. For example, a guest user may beused in coordination with special role-based accounts to createversatile HMI security experiences that are easily customizable, basedupon an industry or control environment policy. For example, accesslevels for initial power up and/or initialization of the interfacedevice and/or access levels used when a user logs out of the interfacedevice may be highly customizable. For example, when the access rightsassociated with guest user are full access (e.g., read and writeaccess), security may be effectively disabled on the interface device.When the access rights associated with the guest user are no-accessrights, ever user would be required to login using an alternate account.Further, any combination of user access rights may be attributed to theguest user. For example, the user may have access to view certainobjects, read and write to other objects, and/or have no access toanother set of objects. If the user requires access rights outside ofthis subset of rights attributed to the guest user, the user would needto login with another account that includes the proper access rights.

In accordance with present embodiments, by utilizing the flexiblesecurity solutions described herein, customers may customize the HMIexperience for their own particular security policies. For example, byproviding the presently disclosed flexible security solutions, presentembodiments enable the customer to dictate initial access offeringsbefore a user's credentials are verified, enabling a more robustsecurity solution for a variety of automation control and monitoringenvironments. Further, through security inheritance, provided inaccordance with present embodiments, customers of the automation controland monitoring system may experience easier customization of screensand/or objects accessed by the HMIs.

A number of facets, components and processes will be described throughthe following discussion. By way of introduction, a general systemoverview is in order that situates these innovations in context. FIG. 1is a diagrammatical representation of a control and monitoring softwareframework 10 for an interface in accordance with an embodiment of thepresent disclosure. The framework 10 facilitates building functionalsoftware by utilizing a module based interconnection mechanism 12, whichinherently supports dynamic manipulation and configuration. This dynamicmanipulation and configuration ability facilitates efficient provisionof feature-rich configuration environments for configurable interfaces.That is, as described below, individual device elements are provided asstand-alone code that can be individually programmed, pre-written foruse, as in a library, customized in their function and appearance inscreens, and interconnected to provide information to a user as well ascontrol and monitoring functions.

The framework 10 includes two interrelated software environments thatcan reside on a single system (e.g., computer). Specifically, a run-timeenvironment 14 enables an operator (e.g., a human user) to interact withan application, such as a process during run-time (e.g., during use ofthe interface, typically during interaction with or observance of aprocess in operation). A design-time environment 16 permits a designerto configure the interface and its components. For example, a system maygraphically present run-time information to an operator via the run-timeenvironment 14 on a display (e.g., computer or interface device screen).Further, the system may include means (e.g., a keypad) for acceptingoperator input that can be detected and managed via the run-timeenvironment 14. The environments interact as described in detail below,in innovative ways to provide greatly enhanced programming and use ofthe interface.

The run-time environment 14 includes or provides access to deviceelements 18. The device elements 18 are software components that mayinclude any accessible or configurable element in a softwareenvironment. For example, the device elements 18 include softwarecomponents, such as “ActiveX” controls or “.NET” components that aremanaged by the run-time environment 14. “ActiveX” and “.NET” refer toobject-oriented concepts, technologies and tools. Those skilled in theart will be well-acquainted with such programming approaches generally.In the present context, such standards should be taken as merelyexamples, and “device elements” should be understood as including anygenerally similar components or self-sufficient programs that can be runas quasi-independent elements, sometimes referred to as “objects”. Otherstandards and platforms exist for such elements, typically championed bydifferent companies or industry groups.

The device elements described herein may be read, edited, and/oraccessed based upon the flexible security solutions described herein.Because such device elements are basic to certain of the concepts setforth herein, a few words of introduction are in order. Device elementsgenerally include four features: properties, methods, connections (orconnection points) and communications interfaces. Properties, in thiscontext, are attributes that can be adjusted, such as to define an imageor representation of the element in a screen view, as well as itslocation on the screen, and so forth. In this context, a method is anexecutable function (sometimes referred to herein as the elements“functionality” or “state engine”), and defines an operation performedby execution of the element. A connection, in this context, is a linkbetween elements, and can be used to cause data (read from a memory orwritten to a memory) to be sent to another element.

Specific examples of device elements 18 may include softwarepushbuttons, timers, gauges, PLC communication servers, visualizations(such as screens that illustrate state of components within theautomation control and monitoring system), and applications. In general,virtually any identifiable function may be configured as such anelement. Moreover, as discussed below, such elements may communicatewith one another to perform a wide range of display, monitoringoperations and control functions. It should be noted that deviceelements 18 do not require special limitations for supporting a designmode. Also, while elements associated with an image are quite useful,particularly for visualizations, many elements may not have a visualrepresentation, but may perform functions within an HMI, such ascalculations, or even management and data exchange between otherelements.

The run-time environment 14 typically operates using a communicationssubsystem 20. The communications subsystem 20 is adapted to interconnectthe device elements 18. In practice, the communications subsystem 20 maybe thought of as including the connections of the device elements 18.However, it may include a range of software, hardware and firmware thatsend data to and receive data from external circuits, such as automationcontrollers, other computers, networks, satellites, sensors, actuators,and so forth.

The run-time environment 14 typically operates using a behavioralsubsystem 22, which is adapted to manage the behavior of the deviceelements 18. For example, responsibilities of the behavioral subsystem22 may include the following: place and move device elements, modifydevice elements, group device elements on interchangeable screens, saveand restore screen layouts, manage security, save and restore connectionlists, and supply remote access to the run-time environment 14. Hereagain, in practice, such behaviors may be defined as part of the profile(i.e., the “method” or “state engine”) of each device element.

The design-time environment 16 includes an advanced implementation ofthe behavioral subsystem 22 that facilitates direct or indirectmanipulation of the run-time environment 14, without impeding orcompromising the behavior of the run-time environment 16. That is,design and reconfiguration of the device elements 18 can be done evenwhile an interface is operating. In some instances, the behavioralsubsystem 22 may extend access to the run-time environment 14 via remoteprovision of the design-time environment 16, such as in a conventionalbrowser. The behavioral subsystem 22 allows a designer, depending onsecurity access rights, to interact with and change aspects of therun-time environment 14 of an HMI via a remote programming terminal byserving the design-time environment 16 or aspects thereof to theprogramming terminal from the HMI. For example, an HMI coupled to alaptop via a network may provide a user with configuration capabilitiesby serving up a specific design-time environment 16 to the laptop viathe network.

Details and examples of how this may be done are provided below. Incurrent embodiments, the design-time environment 16 may be a product ofcombining Dynamic Hypertext Markup Language (DHTML) and an Active ServerPage (ASP) server scripting to serve dynamic content to a browser. AnASP script is specially written code that includes one or more scripts(i.e., small embedded programs) that are processed on a server (e.g.,Web server) before the page is sent to a user. Typically, inconventional usage, such script prompts a server to access data from adatabase and to make a change in the database. Next, the scripttypically builds or customizes the page before sending it to therequestor. As discussed below, such scripting is used in the presentframework quite differently, such as to build visualizations withoutprior knowledge of either the functionality of device elements, or theirinterrelationships.

By facilitating changes to device elements, the design-time environment16 allows the designer to make interchangeable design-time models orspecialized implementations of the behavioral subsystem 22. A specificexample of a design-time implementation of the behavioral subsystem 22includes a Web-based design-time environment 16, which extends access toa run-time environment 14 on an HMI via a TCP/IP connection between theHMI and a remote device. The Web-based design-time environment 16facilitates management of the device elements without compromisingrun-time performance or security. For example, the Web-based design-timeenvironment 16 may access the user accounts, associated roles, andaccess rights, such that the Web-based design-time environment 16 mayaccurately determine and implement a user's access rights within thesystem. In one specialized implementation the behavioral subsystem 22gives designers with write access the ability to manipulate aspects ofthe run-time environment 14 using a Web browser that is capable ofaccessing a related interface or HMI. As noted above, and as describedin detail below this is achieved by using a combination of dynamiccontent, scripting, and configuration of the device element properties.

FIG. 2 is a diagrammatical representation of a control and monitoringsystem 24, such as for industrial automation, implementing the frameworkdescribed above in accordance with an embodiment of the presentdisclosure. The system 24 includes an HMI 26 adapted to interface withnetworked components and configuration equipment. In the illustratedembodiment, the HMI 26 is adapted to collaborate with components of aprocess 28 through a control/monitoring device 30 (e.g., a remotecomputer, automation controller, such as a programmable logic controller(PLC), or other controller). The HMI 26 may physically resemble existinghardware, such as a panel, monitor or stand-alone device.

Collaboration between the HMI 26 and components of the process 28 may befacilitated by the use of any suitable network strategies. Indeed, anindustry standard network may be employed, such as DeviceNet, to enabledata transfer. Such networks permit the exchange of data in accordancewith a predefined protocol, and may provide power for operation ofnetworked elements. As noted above, while reference is made in thepresent discussion to networked systems and to systems incorporatingcontrollers and other equipment, the HMI 26, programming techniques, andsecurity features described may be equally well applied to non-networkedcomponents (e.g., GPS displays, game displays, cell phone displays,tablet displays, etc.) and to networked systems outside the industrialautomation field. For example, the arrangements, processes, and securityfeatures described below may be used in facilities management,automotive and vehicular interfaces, computer numeric control (CNC)machines, point of sale (POS) systems, control interfaces for commercialmarkets (e.g., elevators, entry systems), and so forth, to mention onlya few.

The run-time or operation environment 14 constructed and managed by acorresponding behavioral subsystem, is stored on and resident in the HMI26. For example, such a behavioral subsystem can be adapted to load theapplication configuration framework (e.g., 10) from a storage location,such as during initial manufacture or setup of the HMI 26. When loaded,the stored application framework may be adapted to create screens andlocate user interface device elements (actual images or pictorialrepresentations corresponding to the elements) in the screens. Theseapplications, screens, and user interface elements are each types ofdevice elements. As described below, the HMI 26 includes a storedapplication that dictates the layout and interaction of the deviceelements. The Web-based design-time environment 16, which is based on arun-time engine, is also loaded and resident on the HMI 26. Thedesign-time environment 16 may be adapted to handle advanced features(e.g., security management) for both design-time and run-timeenvironments.

The HMI 26 may be adapted to allow a user to interact with virtually anyprocess. For example, the process may comprise a compressor station, anoil refinery, a batch operation for making food items, a mechanizedassembly line, and so forth. Accordingly, the process 28 may comprise avariety of operational components, such as electric motors, valves,actuators, sensors, or a myriad of manufacturing, processing, materialhandling and other applications. Further, the process 28 may comprisecontrol and monitoring equipment for regulating process variablesthrough automation and/or observation. The illustrated process 28comprises sensors 34 and actuators 36. The sensors 34 may comprise anynumber of devices adapted to provide information regarding processconditions. The actuators 36 may similarly include any number of devicesadapted to perform a mechanical action in response to an input signal.

As illustrated, these sensors 34 and actuators 36 are in communicationwith the control/monitoring device 30 (e.g., an automation controller)and may be assigned a particular address in the control/monitoringdevice 30 that is accessible by the HMI 26. The sensors 34 and actuators36 may be in direct communication with the HMI 26. These devices may beutilized to operate process equipment. Indeed, they may be utilizedwithin process loops that are monitored and controlled by thecontrol/monitoring device 30 and/or the HMI 26. Such a process loop maybe activated based on process inputs (e.g., input from a sensor 34) ordirect inputs (e.g., operator input received through the HMI 26).

The server software on the interface permits viewing of the developmentenvironment, and direct reconfiguration of the interface (particularlyof the device elements and their associated appearance andfunctionality) without the need for special viewing or configurationsoftware. This benefit flows from the fact that the device elements andthe design-time environment itself is resident in the HMI 26, and“served up” by the HMI 26 to a browser or other general purpose vieweron a programming terminal 46. In other words, necessary support forexternal computer workstations (e.g., laptop and desktop computers) maybe reduced or eliminated. It should be noted that reference to a“browser” for viewing and modifying configuration of the interfaces isnot limited to Web browsers or to any particular browser. References toa browser are intended to be exemplary. More generally, the term“browser” is utilized herein to reference software which includes anygeneral purpose viewer.

The HMI 26, through the programming of the device elements as describedbelow, may be thought of as including instructions for presenting one ormore screen views or visualizations, and device elements executed uponinteraction with the HMI 26 by reference to the screen views (e.g.,pressing a button, touching a location of a screen, and the like). Thescreen views and device elements may be defined by any desired softwareor software package. For example, the screen views and device elementsmay be called by or executed by an operating system 38. The deviceelements, as discussed above, in accordance with present embodiments,may be objects conforming to “.NET” or “ActiveX” standards. Theoperating system itself may be based upon any suitable platform, such asWindow CE, OS-X, etc. As referenced herein, the device elements andtools support Web services or technology for transmitting data overnetworks (e.g., the Internet). These device elements thus follow a setof rules regarding information sharing and are adapted for use withvarious scripting and programming languages, as described below. Suchdevice elements enable provision of interactive content to outsideapplications such as a LAN, WAN, an intranet, an extranet, or even theWorld Wide Web. Accordingly, the operating system 38 and the variousdevice elements facilitate dynamic configuration of the HMI 26 through abrowser 48 by allowing configuration access (e.g., serving up) to thebrowser 48.

For example, such configuration access includes access for instantiationof device elements. In other words, new device elements can actually becreated and implemented from the browser 48. Again, it should be notedthat the browser 48 does not require actual functional access. Indeed,in one embodiment, requests via the browser 48 result in a “draw”sequence of operations based on data functionality and content of deviceelements in a container, thus allowing illustration of the deviceelement representations and access to their configuration withoutactually serving up functional aspects. This allows for configurationvia a remote workstation without necessitating technical support for theremote workstation.

In addition to the operating system 38 and device elements as describedabove (and as described in greater detail below), the HMI 26 includes anapplication or application layer 40. The application 40, which mayitself comprise a device element, facilitates access to and acquisitionof information from the various device elements of the HMI 26. Inparticular, the application 40 represents a first level in a multi-leveldevice element that can be enumerated for execution. The application 40in a practical implementation may comprise a user application in theform of an XML page. The user application is then interacted with by theuser or operator, as well as by the designer as described in greaterdetail below.

To facilitate interaction with the application 40, screen views and/ordevice elements may be presented to the user. The screen views anddevice elements may be described as independent executable pieces ofsoftware. In a present implementation, the screen views are defined byappropriate code written in a markup language (e.g., Hypertext MarkupLanguage or HTML). Thus, the configuration of graphical interfacescreens for the HMI 26 may be performed without the use of conversionprograms. Further, by programming of the device elements, the screenviews may be developed directly on the HMI 26 via resident serversoftware (designated as server 42) that makes the resident developmentenvironment available for remote access. Specifically, in oneembodiment, representations of certain device elements (e.g., ActiveXcontrols) are served up to the browser 48 without serving up thesoftware components themselves. Because a development or design-timeenvironment may be accessed via a browser 48, the need to downloadchanges to the screens and to update remote configuration softwareapplications can be eliminated.

As noted above, device elements may include functionality by which theyread from or write to specific memory or registers of memory, typicallyin other devices (but which could also be within the HMI). For example,a particular function may correspond to writing to or reading from aregister 32 of control/monitoring device 30. In a simple case, forexample, an object accesses a piece of data (e.g., a state of acomponent as determined by a sensor), and generates an output signal towrite a value corresponding to the state of a different networkeddevice. As will be discussed in more detail below, such stateinformation may be communicated via state deltas 43. For example, in theembodiment depicted in FIG. 2, when a user has proper access to writechanges to the application 40, the control/monitoring device 30 and HMI26 may communicate state information representing those changes usingstate deltas 43. Further, a programming terminal 46 may communicatestate information with the HMI 26 and control/monitoring device 30 usingthe state deltas 43, as well. Before any changes are propagated, accessrights of a user making the change may be authenticated, thus reducingunauthorized modifications to the application 40.

Much more complex functionality can, of course, be configured. In anindustrial control and monitoring context, for example, such deviceelements may emulate operation of a range of physical components, suchas a momentary contact push button, a push button with delayed output, aswitch, and so forth. Many pre-programmed device elements may beavailable for use by the HMI 26. Such functional modules may beaccessible via a network, or may be resident on the HMI 26, or residenton a separate device directly linked to the HMI 26. In this way, an HMIsupplier or software supplier may provide many possible building blocksfrom which screens and complex control and monitoring functions may beprogrammed. Indeed, a library 44 of available device elements may resideon the HMI 26. When a user has proper rights to access and use thelibrary 44, the library 44 may facilitate configuration of the HMI 26,as described below. The screen instructions may call upon the deviceelements for performing desired functions based upon operator inputs,and these instructions may be programmed into versions of thepre-programmed elements. For example, the operator may provideinitiating inputs by touching a location on a touch screen or depressingkeys on a keyboard. Based upon the screen instructions and the deviceelements associated with the instructions (e.g., with specific locationstriggering calls or execution of pre-configured device elements) thedesired functions may then be executed. Accordingly, when the operatorhas sufficient access, the operator is enabled to interact with aprocess, typically to change screen views, write to registers, orcommand the generation of other output or control signals. In astand-alone implementation, the interactions may simply recall or storedata, change screens, and so forth.

One or more separate interface screens may be employed, with some HMIshaving many such screens and a great number of device elements. Eachdevice element may, in turn, be uniquely programmed to consider specificinputs, perform specific functions, and generate signals for specificoutputs. A plurality of such device elements can be loaded and hosted ina single software “container” (e.g., ActiveX container) as describedbelow. Also, as described herein, each of the interface screens may beuniquely programmed to only be accessible to certain users and/or rolesbased upon access rights associated with the user and/or roles. Theseaccess rights may be inherited from other, higher-level, interfacescreens or folders containing the interface screens.

The HMI 26 may be configured by interacting directly with a panel orscreen on the HMI 26 itself (if one is present), but in many casesconfiguration will be performed from the remote programming terminal 46.For example, access is provided directly to the resident library 44and/or operating system 38 and application 40 via the browser 48 orsimilar application. In a present implementation, no other specializedsoftware is required at the programming terminal 46. Indeed, the server42 resident on the HMI 26 may provide access to the device elements inthe library 44. By storing the device elements in the library 44directly on the HMI 26, the risk of version conflicts and so forth areeliminated or reduced. Additionally, the HMI 26 may be directlyconnected to the programming terminal 46, or accessed by reference to anIP address (Internet Protocol address) assigned to the HMI 26.

Access control schemes may be used to limit the ability to change, view,or manage screens and device elements, in accordance with presentembodiments. For example, a password or user access status may berequired to gain such access. As will be discussed in more detail below,a user may be required to login to activate an account assignedpre-defined user roles, wherein the user role devices access boundaries.Such roles are assigned, for example, based upon a user's job roles.These user roles may be associated with access rights, such as noaccess, read only access, and/or full access for a particular screen,folder of screens, project, etc. Further, in some embodiments, theseaccess rights may be inherited in a hierarchical manner. For example, ascreen contained in a folder may inherit access rights for some or allof the user roles from the containing folder.

In some embodiments, a default account (e.g., a “guest account”) may belogged into the interface device (e.g., HMI 26) upon power-up and/orinitialization of the HMI 26 or upon log out of another user of the HMI26. In other words, a default account is treated like a user login andcan be assigned particular roles. The default user/account may beassociated with any of the pre-defined roles in the system. Accordingly,because any of the pre-defined roles may be associated with the defaultaccount, any set of user access rights associated with the various roles(e.g., read only access, full access, inherited access, and/or noaccess) may be associated with the default user.

Once the device elements then resident on the HMI 26 are accessible tothe programming terminal 46, aspects of the HMI 26 can be modified orupdated directly on the HMI 26 via the communication link from theprogramming terminal 46. However, access to modify these aspects maydepend on access rights of the currently logged in account andassociated user role. For example, a user may wish to update aparticular HMI graphic to provide data, such as historical data ortrending relating to information being received from a newly installedsensor 34. Additionally, the user may find it desirable or convenient toupdate the HMI graphic for presentation of such data while in anoff-line mode (e.g., without immediately implementing the changes). Insuch a scenario, the user may link to the library 44 of available deviceelements via the programming terminal 46 and use them to modify the HMIgraphic or functionality in a development environment, but only if theuser has write access (e.g., full access) to the objects and data storedin the current HMI screen.

It should be noted that additional device elements can be added to thelibrary 44. For example, if a trending device element is not resident onthe HMI 26, a user can download such an element to the HMI 26 from aconfiguration library 50 resident on the programming terminal 46.Alternatively, a user could access the trending device element from aresource library 52 accessible via a network (e.g., the Internet),either directly to HMI 26 or through the programming terminal 46. Thismay be particularly beneficial because new and improved device elementscan be downloaded to the HMI 26 individually and on a periodic basis,thus adding new functionality without necessitating the periodic releaseof new conversion programs or HMI operating systems, or run-time ordesign-time environment software. The development environment mayprovide links to such libraries. Further, in embodiments using embeddedcode (e.g., operating system, server software, device objects, etc.),because the embedded code resides on the HMI 26, version conflicts withthe embedded code may be avoided and the necessity for programmingterminal software upgrades may be eliminated.

To better illustrate the relationship between the design-time andrun-time environments, FIG. 3 provides a high-level flow diagramrepresenting interaction between an HMI 26 and a programming terminal46. More detail regarding such processes is provided below. In general,a platform for the HMI 26 and programming terminal 46 will include theoperating system or executive software 38, application software 40, aswell as any communication software, a microprocessor, a networkinterface, input/output hardware, generic software libraries, databasemanagement, user interface software, and the like (not specificallyrepresented in FIG. 3). In the illustrated embodiment, a design-timeplatform and a run-time platform interact within the HMI 26. Thedesign-time platform provides views that are served as the design-timeenvironment 16 to a desktop personal computer platform (e.g., running asuitable operating system 38, such as Windows XP, Windows Vista, orLinux) and the run-time platform cooperates with the design-timeplatform via the operating system (e.g., Windows CE, Linux). Thedesign-time platform provides dynamic server content 54, while therun-time platform displays views on the HMI 26 itself (if a displayscreen is provided on the HMI 26). The design-time environment 16 isdisplayed in a browser 48 (e.g., Web browser or other general purposeviewer).

FIG. 3 represents at a very high level how the design-time environment16 interacts with the operating system 38, application 40 and run-timeenvironment 14. The arrow 56 represents dynamic exchange of contentbetween the HMI 26 and programming terminal 46. In general, interactionwith the design-time environment 16 is the task of a designer 58 whoinitially configures the HMI screens or visualizations, device elements,their functions and interactions, or who reconfigures such software.Such configurations by the designer may be facilitated through theaccess rights described herein. For example, the designer 58 may only beable to configure the HMI screens or visualizations if the designer 58is logged in under an account with associated write access rights. Whenproper rights are associated with a user account, the run-timeenvironment 14 is generally interacted with by an operator 60 directlyat the HMI 26. It should be noted that while the design-time environment16 has particular hardware and/or software dependencies, in a currentembodiment, it depends heavily on the operating system 38, application40 and run-time environment 14. The design-time environment 16 and therun-time environment 14 may utilize certain base technologies (e.g.,DHTML, HTML, HTTP, dynamic server content, JavaScript, Web browser) tooperate respectively in the design-time platform and run-time platform.While, in the illustrated embodiment, the run-time environment 14 andthe design-time environment 16 reside on separate platforms, in someembodiments they may reside on the same platform. For example, thedesign-time platform and run-time platform may be configured as orconsidered a single platform.

In one embodiment of the present disclosure, a design-time Webimplementation is utilized. This design-time Web implementation offersthe speed and flexibility of software running on the design-timeplatform by using the Web browser (e.g., 48) with DHTML support from theHMI, as noted by the dynamic server content 54 in FIG. 3. DHTML is usedto perform dynamic manipulation of Web content in the design-timeenvironment 16. Further, the dynamic server content 54 is used in theHMI to serve dynamic Web content to the design-time environment 16. Thisdynamic client-server environment allows the Web browser to simulate anapplication running on the design-time platform without requiring apiece of software compiled for a related processor.

FIG. 4 is a diagram illustrating one or more device elements in adesign-time environment in accordance with embodiments of the presenttechniques. The diagram includes interactions illustrated byrelationships between a display 100 (e.g., a screen for browserdisplay), a property editor 102, and the HMI 26.

The design-time environment represented by the configuration screen ordisplay 100 includes static content 104 and dynamic content. The dynamiccontent includes images corresponding to any displayed or representeddevice elements 106 (e.g., virtual on/off button, gauge). In oneembodiment of the present techniques, the image is specified by an imagetag in HTML and is part of a JPEG file created by the HMI as describedbelow. The static content 104 may be created by an active server page(ASP) server or it may preexist in an HTML file. As discussed above, itshould be noted that, in some embodiments, only designated designers canedit the static content 104. For example, to edit static content 104 ordynamic content, the designer's account would need to be associated withproper edit rights (e.g., write access) for the static content 104 orthe dynamic content. In some cases, all designers may be granted editrights by associating write access to a designer role associated withall of the designers' accounts.

The design-time environment represented by the configuration screen ordisplay 100 includes static content 104 and dynamic content. The dynamiccontent includes images corresponding to any displayed or representeddevice elements 106 (e.g., virtual on/off button, gauge). In oneembodiment of the present techniques, the image is specified by an imagetag in HTML and is part of a JPEG file created by the HMI as describedbelow. The static content 104 may be created by the ASP server or it maypreexist in an HTML file. It should be noted that, in some embodiments,designated designers only can edit the static content 104.

In the representation of FIG. 4, the device element representation 106is contained within a view container 108. As will be appreciated bythose skilled in the art, a container generally defines a portion of aprocessing space in which certain device elements are opened and readyfor use. The container 108 may thus correspond to a first view containerthat includes only the elements viewable within the current screen. Asdiscussed above, many such screens may be provided in the HMI. Otherscreens, such as alternative control or interface screens may beprovided in other view containers, such as a container 110. In general,to speed the operation (e.g., changing between screen views) of the HMI,such view containers are predefined and associated with one another bydefinition of the individual device elements with which they are eitherassociated or within which representations of the device elements areprovided. A global container 112 may be defined to include all of thedevice elements necessary for the various view containers, as well asother elements that may not be represented in any view container.

As illustrated in FIG. 4, view container 108 includes the virtual button106 which performs a “jog” function and is manifested by arepresentation in a first screen. New container 110 includes severalcomponents, such as a “start” button 114, a “stop” button 116, a virtualgage 118 and a digital readout 120. The global container 112, then, willinclude all of these device elements for the various view containers, aswell as any device elements 122 that are required for operation of theviewable device elements but that are not themselves viewable. Suchdevice elements may include elements that perform computations,trending, communications, and a wide range of other functions.

As discussed above, these containers may be used to define a hierarchyuseful for inheritance of access rights. For example, each of thesecontains may have associated access rights based upon user roles and/oruser accounts. Access to the containers (and the content inside thosecontainers) may be limited based upon the access rights associated withthe user roles and/or user accounts. For example, in some embodiments,the global container 112 may contain the view container 108. Because theglobal container 112 contains the view container 108, access rights forthe view container 108 may be inherited from the global container 112.Further, objects within the view container 108 (e.g., the virtual button106) may inherit access rights from the view container 108 and/or ascreen contained in the view container 108. When a user does not haveproper access rights (e.g., read access), the user may not access thecontainer 108 or the elements within the container 108. Accordingly, anynavigation elements leading to these elements may be disabled or hiddenfrom the user.

FIG. 4 also illustrates the property editor 102 in which a user mayaccess various properties of the element 106. As discussed above, theelement 106 may also include connections and text associated with theelement 106, which may also be configured by the user via an editor,similar to the property editor 102. Access to the property editor 102may depend on the role and access rights of the user logged in to thesystem. For example, when no access is associated with the logged inuser's role, the property editor 102 may not be visible or may bevisible but not populated with data. When read only access is associatedwith the user's role, the data in the property editor 102 may bepopulated but may not be editable (e.g., as indicated by being grayedout). When the user's role is associated with write access (e.g., fullaccess) the property editor 102 may be populated with data and the datamay be editable.

In an embodiment, the property editor 102 may interact with the HMI 26via a query string from the browser (e.g., browser 48 of FIG. 2) to aserver 96 (e.g., HTTP server) that is resident on the HMI 26. The server96 cooperates with an ASP server 98 including the module basedinterconnection mechanism 12, such as a dynamic-link library (DLL) 99 toreceive and respond to queries. The DLL 99 allows for storage ofexecutable routines as separate files, which can be loaded when neededor referenced by a program. In the example set forth above, uponreceiving the call, the page is reloaded by the ASP server 98 and thequery string is initially parsed resulting in evaluation of the movecommand. Server side scripts then access the device element 18represented by the image 106 and update its location property. The newproperty information is then updated on the page and the page is passedto the browser 48.

FIG. 5 is a representation of a security programming screen orvisualization 130 of the control and monitoring system 24 of FIG. 2. Thevisualization 130 includes programming features for the default user(e.g., “guest account”). The security programming screen 130 may beuseful for assigning security policies (e.g., user roles) for users ofthe control and monitoring system 24. For example, as discussed above,the default user (e.g., “guest user”) may be logged into the system uponpower on and/or initialization of an interface device (e.g., HMI) orupon log out of another user of the interface device. This default userenables a particular set of access rights to be used in the control andmonitoring system 24 without requiring a user to login to the HMI. Asillustrated in FIG. 5, the guest user role may have a limited number ofeditable attributes in the security programming screen 130. Because thisaccount is a default account that is logged in automatically upon poweron and/or initialization of an interface device and/or upon log out ofanother user of the interface device, in some embodiments, user names,passwords, personal identification numbers (PINs), etc. may not beneeded. Accordingly, as illustrated in FIG. 5, in one embodiment, theonly modifiable attribute of the guest user is the guest user role.

As shown in FIG. 5, a drop-down box 132 or other user input may beprovided for defining the guest user role 134. As discussed above,pre-defined roles may be provided in the system 24. For example, in theillustrated embodiment, the pre-defined roles include: Administrator136, Engineer 138, Maintenance 140, None 142, Operator 144, Restricted146, and Supervisor 148. As may be appreciated, the role ofAdministrator 136 may be assigned to users who are tasked with overallsystem management. The role of Engineer 138 may be assigned to userstasked with design and oversight of equipment within the system. Therole of Maintenance 140 may be assigned to users tasked with maintainingand/or monitoring equipment within the facility (e.g., a user taskedwith monitoring and/or maintaining engine equipment within the system24). The role of Operator 144 may be assigned to a user tasked withoperation of particular equipment in the system 24 and the role ofSupervisor may be assigned to users who are managers of other users. Therole of None 142 may be assigned to users who do not have a currentrole. For example, when a user no longer has an active role with regardsto the system 24 (e.g., the user 24 is terminated and/or moved on toanother project) the user's role may be set as None 142. This may enablethe user account to remain active while noting the user does not have arole in the system 24. The role of Restricted 146 may be assigned to anyuser that should have limited access to the system. This may beparticularly useful for the guest user account, because the guest useraccount does not require an authentication input (e.g., password orpersonal identification number) to login to the system 24.

The security programming screen 130 may also include customizablesecurity options for the other users of the system 24. For example, eachuser account may have a modification section 150. In some embodiments,the modification section 150 may be collapsed until an expansion input152 is selected. In the collapsed view, the modification section 150 mayprovide the user name 154, the role 156 assigned to the user's account,and/or the full user name 158 associated with the account. Uponexpansion, an expanded view 160 may be provided with editable fields162. For example, a user name field 164, a full name field 166, adescription field 168, a role drop-down or input 170, a password field172 and/or a PIN field 174 may be provided. Additionally, a reset button176 may be provided. The reset button 176 may empty or reset all fieldsto default values upon selection. Additionally, the security programmingscreen 130 may also include an OK button 178 that applies the changesand closes the security programming screen 130, a Cancel button 180 thatcancels any changes that have not already been applied, and an Applybutton 182 that applies any changes but leaves the security programmingscreen 130 open.

Having now discussed user accounts being assigned roles, the discussionturns to roles being assigned access rights. FIG. 6 is a schematicdiagram of a folder security properties screen 200 and a componentsecurity properties screen 201 for components of the control andmonitoring system 24 of FIG. 2. Access rights may be assigned at acomponent level within the control and monitoring system 24. Forexample, these access rights may be assigned at a container or folderlevel, at an HMI screen level, or at the components within the HMIscreen. The folder security properties screen 200 illustrates user rolesbeing assigned access rights for a folder component and the componentsecurity properties screen 201 illustrates user roles being assignedaccess rights for a screen component. As illustrated in FIG. 6, theproperties screens 200, 201 may provide identification of a name of thecurrent component, via a name field 202. Further, the properties screens200, 201 may include the component type (e.g., a folder, HMI screen, orelement within an HMI screen), via a type field 204. For example, asindicated by the fields 202 and 204 in folder security properties screen200, properties for a “Milk” folder are provided. In the componentsecurity properties screen 201, as indicated by fields 202 and 204,properties for a “Filling” screen are provided. The folder securityproperties screen 200 and component security properties screen 201 mayinclude a list of roles 206 and fields 208 useful for specifying accessrights for the particular roles in the list of roles 206. In someembodiments, certain access roles may not be editable. For example, inthe illustrated embodiment, the role of Administrator includes a forcedinherit access right. This may be set based upon security policies of aparticular system. For example, in systems that require an administratorto always have full access, the global container may set the role ofadministrator 136 to have full access, and each component in the systemmay be required to inherit this full access association from the globalcontainer. Additionally, the security properties screen 200 may includea switchable preference 210 to show the component in a navigation menu220. When selected, the component will show up in navigation menu 220 ofthe system. When de-selected, the component will not show up in thenavigation menu 220 of the system. As illustrated, the navigation menu220 may provide a navigable menu of folders, screens and othercomponents of a project (e.g., the “mootastic” project). Only componentsindicated by the preference 210 will be displayed in the navigation menu220.

Having now discussed the association of access rights to a user role,the discussion turns to security inheritance. FIG. 7 illustrates aschematic diagram of security property of a screen of the control andmonitoring system being inherited by objects contained in the screen, inaccordance with an embodiment. As indicated by the security propertiesscreen 240, which provides security settings for the “Home” screen, theroles of Administrator 130, Engineer 138, Maintenance 140, andSupervisor 148 each inherits access rights from the containing folder.For example, these roles will take on the access assigned to theircorresponding roles at the containing folder level. The role of Operator144 is assigned a full access role and the role of Restricted 146 isassigned read only access rights. As discussed above, the guest userwill oftentimes be assigned the role of Restricted 146 because no loginpassword or PIN is required. Instead the user is logged in automaticallyupon power on and/or initialization of an interface device (e.g., HMI)and/or log out of another user of the interface device. Accordingly, anadministrator of the system may desire to restrict access for the guestuser.

Elements within the “Home” screen may, by default, inherit access rightsfrom the screen security properties. For example, HMI screen 242 is anexample of an HMI screen provided in the run-time environment. Asillustrated, the HMI screen 242 contains many objects. For example, animage 244, a production total field 246, a fill flow rate field 248, andcrates in storage field 250 are provided. Further, a fill levelindicator 252, a storage indicator 254, and a graphical temperatureindicator 256 are provided. Additionally, a current user name and roleindicator 258 and a reset button 260 are provided. Each of these objectsmay inherit access rights from the screen security properties. Forexample, the reset button 260 may provide inherit access rights foradministrators, engineers, maintenance personnel, and supervisors.Further, full access may be provided for operators and read only accessmay be provided to restricted users.

As indicated by the current user name and role indicator 258, a guestuser is currently logged into the interface device. As discussed above,in the current embodiment, an administrator has assigned the guest usera restricted role. As indicated by the security properties screen 240,read only access is provided for the guest user account. Accordingly,because each of the objects within the “Home” screen may inherit theseaccess rights, the reset button 260, for example, also has read onlyrights for the guest user account. Thus, the reset button 260 isviewable to the guest user, but cannot be acted upon.

HMI screen 262 illustrates and example embodiment of a resultant outcomewhen a guest user attempts to press the reset button 260 when onlyhaving read only access. As illustrated in HMI screen 262, when a userwith read only access attempts to write to or otherwise access an objectwithout such rights (e.g., pressing a reset button 260), an errorgraphic 264 may appear over the object. Further, an error dialog box 266may be referenced from the error graphic 264, and may indicate thatsufficient access rights do not exist for a user to complete theattempted activity. For example, the error graphic 264 may be selectedwith a cursor to initiate display of the error dialog box 266. In thecurrent error dialog box 266, the dialog box 266 indicates that thereset button is read only.

FIG. 8 is a flowchart, depicting a process 280 for implementing flexiblesecurity settings in an automation control and monitoring system, inaccordance with an embodiment. As discussed above, an interface deviceis powered on and/or initialized (block 282). In some embodiments, anoverride key may enable a user to login before the guest user is loggedin. Accordingly, a determination may be made whether an override triggeris detected (decision block 284). If an override trigger is detected, analternate user login may be determined and/or authorized (block 286).After authorization, the alternate user is logged in (block 288). Thesystem then polls for a requested log out by the alternate user(decision block 290). For example, the log out request might be made viaa logout option of a toolbar presented in a graphical user interface ofthe interface device, might be triggered based upon an object presentedin a visualization of the interface device, could be triggered byanother component of the automation control and monitoring system (e.g.,a controller), might be triggered via a script in an HMI application,etc. If no log out is requested, the alternate user remains logged inuntil such a request is received (block 292).

When a logout request is received from the alternate user or no overridewas detected, the guest user is logged in (block 294). The system pollsfor a request for an alternate login (e.g., a request to login aspecific user other than the guest user) (decision block 296). If notsuch request is received, the guest user remains logged in until such arequest is received (block 298). If such a request is received thealternate user login is determined and/or authorized and the user islogged in (blocks 286 and 288). The alternate user log out is processedaccording to blocks 290-294, discussed above.

Having now discussed the guest user account, its associated roles andaccess rights, and a process for logging in and out the guest user andalternate users, the discussion turns to an embodiment of an interfacedevice configured to use and facilitate these flexible securityfeatures. FIG. 9 is a schematic view of a human-machine interface (HMI)310 with the flexible security features described herein, in accordancewith an embodiment. As discussed above, the HMI 310 may be useful formonitoring and/or controlling processes within an automation control andmonitoring system. The HMI 310 may provide field measurements, etc. ofprocesses within the automation control and monitoring system. Tofacilitate the flexible security features described herein, the HMI 310may include a toolbar 312 that provides current access rightinformation. For example, the toolbar may provide an account nameassociated with an account that is currently logged into the HMI 310, afull name of a user associated with the account, access rightsassociated with the account for the currently displayed component of theHMI 310, or a combination thereof.

In some embodiments, the interface device or other component of theautomation control and monitoring system may track access utilization ofthe interface device. For example, the interface device may monitorunsuccessful login attempts, successful login attempts, utilization ofthe guest user account, etc. The access utilization may be stored as ahistorical log in computer-readable storage. Such information may beuseful in determining who has accessed the interface device at aparticular time. Further, the information stored in the historical logmay help to detect unauthorized access attempts, etc.

FIG. 10 illustrates a more detailed schematic view of the toolbar 312 ofthe HMI 310 for facilitating flexible security elements, in accordancewith an embodiment. As illustrated, the toolbar 312 may provide anaccount name 314 (e.g., “Joe”). Further, the toolbar may provide a role316 associated with the currently logged in account (e.g., “Operator”).These attributes (or any other security related attributes) may beprovided in the form of a toolbar button 318. The toolbar button 318,when pressed, may trigger a login dialog box (e.g., login dialog box 320or 322). The login dialog boxes 320, 322 are quite similar. Both providean indicator 324 of the currently logged in user and/or role (e.g., “Joeoperator”). Further, both provide a user name field 326 that enables thecurrent user to provide a new user account to login to the system.Depending on the account associated with the username, a password and/ora PIN may be assigned (as discussed with regards to FIG. 5).Accordingly, login box 320 (with a password field 328) may be providedwhen the account includes a password and login box 322 (with a PIN field330) may be provided when the account includes a PIN. Additionally, bothlogin boxes 320, 322 provide a log out button 332. When pressed, thecurrent user (e.g., “Joe Operator”) will be logged out of the system.Further, as discussed in the process 280 of FIG. 8, the guest user islogged back in to the system.

The toolbar 312 may also include other features accessible to thecurrently logged in user. For example, an alarm indicator 332 mayprovide alarm information if the user has available access (e.g., atleast data read only access). Further, a tools button 334 may provideaccess to HMI tools. Navigation buttons 336 may provide access toprevious screens accessed by the HMI. In some embodiments, thenavigation buttons 336 may be disabled based upon forward-looking and/orbackward-looking access rights. For example, forward and/or backwardnavigation buttons 336 may be disabled when the logged in user does nothave read access to the screens these buttons 336 navigate to. A historyindicator 338 may provide historical data for the HMI, a time indicator340 may provide the current time according to the HMI's clock, and apower indicator 342 may provide an indicator of a power source andstatistics for the HMI.

By providing a guest user account that automatically logs in to aninterface device of an automation monitoring and control system,administrators of these devices may have an increased ability tocustomize security options, such as allowing access to these deviceswithout requiring a username, password, or PIN. Additionally, bycreating a restricted role that may be associated with this guestaccount, these administrators may still provide a required loginsolution. For example, the guest user could be associated with therestricted role and the restricted role could be provided no access tothe home screen of the project. Accordingly, to access any informationwithin the project, a user would necessarily have to provide logincredentials. The combination of a guest user account with a restrictedrole thus generates a flexible security solution that is relatively easyfor the administrator to customize.

While only certain features of the invention have been illustrated anddescribed herein, many modifications and changes will occur to thoseskilled in the art. It is, therefore, to be understood that the appendedclaims are intended to cover all such modifications and changes as fallwithin the true spirit of the invention.

The invention claimed is:
 1. An automation control system, comprising:an interface device configured to enable a user to monitor, control, ormonitor and control processes of the automation control system; wherein,after initialization of the interface device, the interface device isconfigured to: whenever an authentication input has not been received,login a guest account associated with a restricted user role having adefined set of access rights specific to users that have not provided anauthentication input, wherein the defined set of access rights areselectively changeable via an account associated with administration ofthe defined set of access rights; and whenever the authentication inputhas not been received, provide access to monitor, control, or monitorand control the processes based upon the set of access rights.
 2. Theautomation control system of claim 1, wherein the interface device isconfigured to: poll for an override key at each initialization of theinterface device; when the override key is detected, poll for anddetermine a validity of a provided authentication input; when theprovided authentication input is not valid, login the guest account; andwhen the provided authentication input is detected and valid, login auser account associated with the provided authentication input.
 3. Theautomation control system of claim 1, wherein the interface device isconfigured to login the guest account when an alternate account islogged out of the interface device.
 4. The automation control system ofclaim 3, wherein the interface device comprises a human machineinterface (HMI).
 5. The automation control system of claim 1, whereinthe access rights are specific to a particular component of theinterface device, the interface device comprising a human machineinterface (HMI), the particular component comprising: an HMI projectassociated with the automation control system; one or more objects of anHMI device screen; the HMI device screen; a first folder of the HMIcontaining interface device screens; or a second folder of the HMIcontaining a first screen.
 6. The automation control system of claim 1,wherein the access rights comprise inherit access rights for aparticular component, wherein the inherit access rights are configuredto inherit access rights for the particular component from a higherlevel component of the interface device.
 7. The automation controlsystem of claim 6, wherein the particular component comprises one ormore objects of an interface device screen and the higher levelcomponent comprises the interface device screen.
 8. The automationcontrol system of claim 1, wherein the interface device is configured tolog out the guest account when an alternate account is authenticated andlogged into the interface device.
 9. The automation control system ofclaim 1, wherein the interface device is configured to provide a toolbarconfigured to enable the user to login as an alternate account.
 10. Theautomation control system of claim 9, wherein the toolbar, auser-defined log-out command, or a system-defined logout command, or anycombination thereof is configured to enable the user to logout thealternate account, thus triggering login of the guest account.
 11. Theautomation control system of claim 1, wherein choices for the accessrights comprise: full access, read only access, no access, and inheritaccess.
 12. The automation control system of claim 1, wherein choicesfor the user role comprise: an administrator role, an engineer role, amaintenance role, an operator role, a restricted role, a supervisorrole, a none role, a user-defined role, or any combination thereof. 13.A method, comprising: after initializing an interface device of anautomation control system: whenever an authentication input has not beenreceived, logging in, via a processor of the interface device, a guestaccount associated with a restricted user role having a defined set ofaccess rights specific to users that have not provided an authenticationinput, wherein the defined set of access rights are selectivelychangeable via an account associated with administration of the definedset of access rights, without requiring login information; and wheneverthe authentication input has not been received, providing, via theprocessor of the interface device, access to monitor, control, ormonitor and control the processes based upon the set of access rights.14. The method of claim 13, polling for an override key at eachinitialization of the interface device; when the override key isdetected, polling for and determining a validity of a providedauthentication input; when the provided authentication input is notvalid, logging in the guest account; and when the providedauthentication input is detected and valid, logging in a user accountassociated with the authentication input.
 15. The method of claim 13,comprising: detecting an override trigger before logging in the guestaccount; providing an alternate user login screen upon detecting theoverride trigger; authenticating a request for login provided from thealternate user login screen; logging in an alternate account if therequest is authenticated; and only logging in the guest account when thealternate account is not logged in.
 16. The method of claim 13,comprising: detecting a request to login an alternate account; loggingout the guest account and logging in the alternate account when therequest is authenticated.
 17. A non-transitory, computer-readablemedium, comprising computer-readable instructions to: whenever anauthentication input has not been received, login a guest account of aninterface device of an automation monitoring and control system, withoutrequiring login information; wherein the guest account is associatedwith a restricted user role having a defined set of access rightsspecific to users that have not provided an authentication input,wherein the defined set of access rights are selectively changeable viaan account associated with administration of the defined set of accessrights; whenever the authentication input has not been received, provideaccess to monitor, control, or monitor and control the processes basedupon the set of access rights.
 18. The computer-readable medium of claim17, comprising instructions to: display a security programming screencomprising a security role input for the guest account, wherein thesecurity programming screen is configured to associate a user role withthe guest account.
 19. The computer-readable medium of claim 18, whereinthe security role input is configured to enable association of the guestaccount with an administrator role, an engineer role, a maintenancerole, an operator role, a restricted role, a supervisor role, a nonerole, a user-configured role, or any combination thereof.
 20. Thecomputer-readable medium of claim 17, comprising computer-readableinstructions to: display a security properties screen associated withcomponents of the interface device; wherein the security propertiesscreen comprises access rights fields for each role provided in theinterface device and the access rights fields are configured to defineaccess rights for each of the roles provided in the interface device.21. The computer-readable medium of claim 17, wherein the access rightscomprise: full access, read only access, no access, and inherit access.